CN209850781U - Internal tooth type ratchet screwdriver - Google Patents
Internal tooth type ratchet screwdriver Download PDFInfo
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- CN209850781U CN209850781U CN201920507448.0U CN201920507448U CN209850781U CN 209850781 U CN209850781 U CN 209850781U CN 201920507448 U CN201920507448 U CN 201920507448U CN 209850781 U CN209850781 U CN 209850781U
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- pawl
- ratchet
- seat
- head
- internal tooth
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Abstract
The utility model discloses an internal tooth type ratchet screwdriver, which comprises a handle and a ratchet head, wherein the handle is provided with a ratchet seat, a first pawl and a second pawl, the bottom of the ratchet head is sleeved on the ratchet seat, the inner wall surface of the ratchet seat is full of teeth, the first pawl and the second pawl have the same structure, the first pawl is in an arc-shaped strip structure, one end of the outer ring of the first pawl is provided with a ratchet structure, the end part of the ratchet seat is provided with an inner core matched with the inner wall structure of the first pawl, the outer ring of one side of the inner core is provided with an arc-shaped barrier strip, a mounting seat formed between the inner core and the arc-, the second pawl is installed on the installation seat, a reversing ring is connected outside the ratchet seat in a clamping mode, a shifting piece located between the end portion of the first pawl and the end portion of the second pawl is arranged on the inner side face of the reversing ring, and the reversing ring rotates to enable the shifting piece to act on the end portion of the first pawl or the end portion of the second pawl, so that the end portion of the first pawl or the end portion of the second pawl is meshed with the ratchet head. High torque and high reliability are realized, and the problems of complex structure and high cost are solved.
Description
Technical Field
The utility model relates to a screwdriver especially relates to an interior tooth-like ratchet screwdriver.
Background
As a tool for tightening and driving screws, a screwdriver in the related art for mounting and removing screws is generally a hand-screw type screwdriver. Because hand rotation has a limit and cannot always be in one direction, tools of this type are used by turning the tool handle in one desired direction, reversing the direction of the hand, and repositioning the tool for the next cycle. The reverse rotation of the hand is to release the handle of the tool and then hold the tool again, so that the main shaft is not moved when the handle is reversed, or to separate the hand-held tool from the screw and then insert the screw again for rotation, so that the whole rotation process is inconvenient.
Therefore, the tool is provided with a one-way device such as a ratchet mechanism, and becomes a ratchet screwdriver. This configuration allows the user's hand to be rotated without disengaging the screwdriver handle or the screwdriver from the screw before reinserting the screw. However, the ratchet screwdriver in the prior art generally adopts a ratchet one-way transmission structure, the ratchet screwdriver can only tighten the screw in a single direction, and the reverse direction cannot be realized. In order to realize the function integration, a plurality of groups of ratchet transmission mechanisms are arranged in the ratchet screwdriver, and screws in different directions can be rotated after the ratchet screwdriver is adjusted.
However, the existing ratchet structure has a complex internal structure and higher production cost. And the internal structure is unstable, and when receiving large torque force, can appear taking off the commentaries on classics condition, the reliability is low. Therefore, I have developed the "an internal tooth ratchet screwdriver" of the present invention to improve the problems of the prior art.
Disclosure of Invention
The utility model aims to solve the technical problem that an interior tooth-like ratchet screwdriver is provided realizes high torsion and high reliability, solves the problem that the structure is complicated, with high costs.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: an internal tooth type ratchet screwdriver comprises a handle and a ratchet head with the head acting on a bolt, wherein the handle is provided with a ratchet seat, a first pawl and a second pawl, the bottom of the ratchet head is sleeved on the ratchet seat, the inner wall surface of the ratchet head is full of gear teeth, the first pawl and the second pawl are identical in structure and are reversely installed in the ratchet seat, the first pawl is of an arc-shaped strip structure, one end of the outer ring of the first pawl is provided with a ratchet structure, the end part of the ratchet seat is provided with an inner core matched with the inner wall structure of the first pawl, the outer ring of one side of the inner core is provided with an arc-shaped barrier strip, an installation seat is formed between the inner core and the arc-shaped barrier strip, the first pawl and the second pawl are installed on the installation seat, the end part of the ratchet structure is exposed outside the arc-shaped barrier strip, a reversing ring is clamped outside the ratchet seat, and the inner side, A paddle between the ends of the second pawl, the reversing ring rotating to cause the paddle to act on the first pawl end or the second pawl end to engage the first pawl end or the second pawl end with the ratchet head.
The utility model discloses further preferred scheme: the inner core and the ratchet seat are not coaxial, the two side surfaces of the inner core are arc surfaces with the diameter larger than that of the ratchet seat, and the inner side surface of the first pawl and the inner side surface of the second pawl are respectively attached to the arc surfaces on the two sides of the inner core.
The utility model discloses further preferred scheme: the first pawl and the second pawl are arranged in a back direction, a bulge used for connecting a spring is arranged at the other end of the first pawl, and the other end of the first pawl and the other end of the second pawl are connected through the spring.
The utility model discloses further preferred scheme: the middle position of the mounting seat is also provided with a convex seat for mounting a spring, the spring is arranged on the convex seat, and the first pawl and the second pawl are positioned on two sides of the convex seat.
The utility model discloses further preferred scheme: the inner wall surface of the reversing ring is provided with a plurality of grooves, the ratchet seat is connected with the clamping piece through the elastic piece, the clamping piece acts on one of the grooves, and the reversing ring rotates to enable the clamping piece to be shifted among the grooves.
The utility model discloses further preferred scheme: the outer surface of the ratchet seat is provided with a notch, the clamping piece is arranged in the notch through an elastic piece, and the clamping piece is a steel ball.
The utility model discloses further preferred scheme: the handle head portion seted up the notch, the outer wall of ratchet seat be provided with the sand grip, the notch with ratchet seat surface structure suit, the ratchet seat insert the notch in circumference, radially fixed.
The utility model discloses further preferred scheme: the handle head is connected with the reversing ring, the reversing ring is connected with the ratchet head, and the handle, the reversing ring and the ratchet head are in contact connection.
The utility model discloses further preferred scheme: the surface of the ratchet seat is provided with a fixing part connected with the clamp spring, and the ratchet head is clamped on the periphery of the ratchet seat through the fixing part.
Compared with the prior art, the utility model has the advantages of ratchet seat, first pawl, second pawl are installed to the handle, and ratchet head bottom overcoat is at the ratchet seat. The inner wall surface of the ratchet head is fully distributed with gear teeth, the ratchet structures at the end parts of the first pawl and the second pawl are exposed outside the arc-shaped barrier strip, and the end part of the first pawl or the end part of the second pawl is meshed with the ratchet head. The first pawl and the second pawl are arranged to limit the rotation of the ratchet head in different directions. When the first pawl acts on the ratchet head, the first pawl prevents the ratchet head from rotating anticlockwise; and the ratchet head rotates clockwise, the first pawl can be separated from the ratchet head, and the ratchet head rotates freely. When the second pawl acts on the ratchet head, the second pawl prevents the ratchet head from rotating clockwise; and the ratchet head rotates anticlockwise, the second pawl can be separated from the ratchet head, and the ratchet head rotates freely. The related parts are few, the whole structure is few, and the cost is not high. The utility model discloses set up the ratchet seat, the tip of ratchet seat is provided with the inner core that suits with first pawl inner wall structure, and inner core one side outer lane is provided with the arc blend stop, the mount pad that constitutes between inner core and the arc blend stop. The first pawl and the second pawl are identical in structure and are reversely installed in the ratchet wheel seat, the first pawl is of an arc-shaped strip structure, a ratchet structure is arranged at one end of the outer ring of the first pawl, and the first pawl and the second pawl are installed on the installation seat, and the ratchet structures at the end portions of the first pawl and the second pawl are exposed outside the arc-shaped barrier strips. The first pawl and the second pawl move in the arc-shaped mounting seat of the ratchet seat, so that the whole moving structure is very stable. When the force is applied, the first pawl and the second pawl are clamped more and more tightly in an eccentric structure formed by the mounting seat, and the torsion is increased to the wedge-shaped block. The utility model discloses realize high torsion and high reliability.
Drawings
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.
Fig. 1 is a schematic exploded view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a cross-sectional view of section AA in FIG. 2;
FIG. 4 is a cross-sectional view of section BB of FIG. 2;
FIG. 5 is a cross-sectional view of section CC of FIG. 2;
FIG. 6 is a schematic view of a reversing ring;
FIG. 7 is a schematic view of a first pawl;
FIG. 8 is a schematic view of the ratchet head configuration;
fig. 9 is a structural schematic view of the ratchet seat.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1 to 9: an internal tooth type ratchet screwdriver comprises a handle 1 and a ratchet head 3 with the head acting on a bolt, wherein the handle 1 is provided with a ratchet seat 2, a first pawl 5 and a second pawl 6, the bottom of the ratchet head 3 is sleeved on the ratchet seat 2, the inner wall surface of the ratchet head 3 is full of gear teeth 32, the first pawl 5 and the second pawl 6 are identical in structure and are reversely arranged in the ratchet seat 2, the first pawl 5 is of an arc-shaped strip structure, one end of the outer ring of the first pawl 5 is provided with a ratchet 51 structure, the end part of the ratchet seat 2 is provided with an inner core 21 adapting to the inner wall structure of the first pawl 5, the outer ring on one side of the inner core 21 is provided with an arc-shaped barrier 22, an installation seat 23 formed between the inner core 21 and the arc-shaped barrier 22, the first pawl 5 and the second pawl 6 are arranged on the installation seat 23, the ratchet 51 structure on the end part is exposed outside the arc-shaped barrier 22, a reversing, A finger 41 between the ends of the second pawls 6, and the reversing ring 4 is rotated so that the finger 41 acts on the end of the first pawl 5 or the end of the second pawl 6 to engage the end of the first pawl 5 or the end of the second pawl 6 with the ratchet head 3.
The inner core 21 and the ratchet seat 2 are not coaxial, the two side surfaces of the inner core 21 are arc surfaces with the diameter larger than that of the ratchet seat 2, and the inner side surface of the first pawl 5 and the inner side surface of the second pawl 6 are respectively attached to the arc surfaces on the two sides of the inner core 21. The utility model discloses an outer wall of inner core 21 structure suits with the internal face structure of first pawl 5, second pawl 6. The first pawl 5 and the second pawl 6 are arc-shaped strip structures with diameters larger than those of the ratchet seat 2 till now. Therefore, the structure of the inner core 21 is a quasi-elliptical structure with one sharp end, and the edge of the inner core 21 does not exceed the edge of the ratchet seat 2, so that the other end of the inner core 21 is flush with the ratchet seat 2.
The first pawl 5 and the second pawl 6 are arranged back to back, a bulge 53 for connecting a spring 7 is arranged at the other end of the first pawl 5, and the other end of the first pawl 5 and the other end of the second pawl 6 are connected through the spring 7. The spring 7 is arranged so that after the paddle 41 is removed, the first pawl 5 or the second pawl 6 can return to the initial position and engage with the ratchet head 3.
The middle position of the mounting seat 23 is further provided with a boss 25 for mounting the spring 7, the spring 7 is arranged on the boss 25, and the first pawl 5 and the second pawl 6 are located on two sides of the boss 25. A boss 25 is provided for mounting the spring 7 while limiting the limits of movement of the first and second pawls 5, 6.
The inner wall surface of the reversing ring 4 is provided with a plurality of grooves 42, the ratchet seat 2 is connected with the clamping piece 10 through the elastic piece 11, the clamping piece 10 acts on one of the grooves 42, and the reversing ring 4 rotates to enable the clamping piece 10 to be shifted among the grooves 42. The utility model discloses set up three recess 42, screens piece 10 acts on the recess 42 of both sides, realizes respectively that ratchet head 3 clockwise can not rotate, anticlockwise can not rotate. The detent 10 engages the central recess 42, and the ratchet head 3 is rotated in both directions, since neither the first pawl 5 nor the second pawl 6 engages the ratchet head 3.
The outer surface of the ratchet seat 2 is provided with a notch, a clamping piece 10 is arranged in the notch through an elastic piece 11, and the clamping piece 10 is a steel ball. The arrangement of the notch and the steel ball structure realizes that the reversing ring 4 can rotate under the action of external force, and the clamping is not movable without the action of external force.
The head of the handle 1 is provided with a notch 12, the outer wall surface of the ratchet seat 2 is provided with a convex strip 24, the notch 12 is matched with the outer surface structure of the ratchet seat 2, and the ratchet seat 2 is inserted into the notch 12 and is circumferentially and radially fixed. Set up ratchet seat 2 alone, the production and processing of the spare part of being convenient for sets up notch 12 and realizes 2 axial installations of ratchet seat to fixed circumference, radial, make the utility model discloses the structure is reliable when rotatory bolt.
The head of the handle 1 is connected with the reversing ring 4, the reversing ring 4 is connected with the ratchet head 3, and the handle 1, the reversing ring 4 and the ratchet head 3 are in contact connection. The utility model discloses whole outward appearance is succinctly generous, and 4 rotatory convenience of switching-over ring just do not receive ratchet head 3, handle 1 restriction.
The surface of the ratchet seat 2 is provided with a fixing part 8 connected with the clamp spring 9, and the ratchet head 3 is clamped on the periphery of the ratchet seat 2 through the fixing part 8.
The above is to the utility model discloses going on the detailed introduction, having used specific individual example to right in this paper the utility model discloses a principle and implementation mode have been elucidated, and the explanation of above embodiment only is used for helping understanding the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. An internal tooth type ratchet screwdriver comprises a handle and a ratchet head with the head acting on a bolt, and is characterized in that the handle is provided with a ratchet seat, a first pawl and a second pawl, the bottom of the ratchet head is sleeved on the ratchet seat, the inner wall surface of the ratchet head is full of gear teeth, the first pawl and the second pawl are identical in structure and are reversely installed in the ratchet seat, the first pawl is of an arc-shaped strip structure, one end of the outer ring of the first pawl is provided with a ratchet structure, the end part of the ratchet seat is provided with an inner core matched with the inner wall structure of the first pawl, the outer ring of one side of the inner core is provided with an arc-shaped barrier strip, an installation seat is formed between the inner core and the arc-shaped barrier strip, the first pawl and the second pawl are installed in the installation seat, the end part of the installation seat is exposed outside the arc-shaped barrier, a reversing ring is clamped outside the ratchet seat, and the inner side, A paddle between the ends of the second pawl, the reversing ring rotating to cause the paddle to act on the first pawl end or the second pawl end to engage the first pawl end or the second pawl end with the ratchet head.
2. The internal tooth ratchet screwdriver according to claim 1, wherein the inner core is not coaxial with the ratchet seat, the two side surfaces of the inner core are arc surfaces with a diameter larger than that of the ratchet seat, and the inner side surfaces of the first pawl and the second pawl are respectively attached to the arc surfaces of the two sides of the inner core.
3. The internal tooth ratchet screwdriver according to claim 1, wherein the first pawl and the second pawl are oppositely arranged, the other end of the first pawl is provided with a protrusion for connecting a spring, and the other end of the first pawl and the other end of the second pawl are connected through the spring.
4. The internal tooth ratchet screwdriver according to claim 3, wherein a boss for mounting a spring is further provided at a middle position of the mounting base, the spring is disposed on the boss, and the first pawl and the second pawl are disposed on both sides of the boss.
5. The internal tooth ratchet screwdriver as claimed in claim 1, wherein the inner wall of the reversing ring is provided with a plurality of grooves, the ratchet seat is connected with a detent member through an elastic member, the detent member acts on one of the grooves, and the reversing ring rotates to cause the detent member to move among the plurality of grooves.
6. The internal tooth ratchet screwdriver as claimed in claim 5, wherein the outer surface of the ratchet seat is provided with a notch, the locking member is mounted in the notch through an elastic member, and the locking member is a steel ball.
7. The internal tooth ratchet screwdriver according to claim 1, wherein the handle head has a notch, the outer wall of the ratchet seat has a protrusion, the notch is adapted to the outer surface of the ratchet seat, and the ratchet seat is inserted into the notch to be circumferentially and radially fixed.
8. The internal tooth ratchet screwdriver of claim 1, wherein the handle head engages the reversing ring, the reversing ring engages the ratchet head, and the handle, reversing ring, and ratchet head are all in contact connection.
9. The internal tooth ratchet screwdriver according to claim 1, wherein a fixing member connected to a clamp spring is disposed on a surface of the ratchet seat, and the ratchet head is engaged with an outer periphery of the ratchet seat through the fixing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920507448.0U CN209850781U (en) | 2019-04-15 | 2019-04-15 | Internal tooth type ratchet screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920507448.0U CN209850781U (en) | 2019-04-15 | 2019-04-15 | Internal tooth type ratchet screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209850781U true CN209850781U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920507448.0U Active CN209850781U (en) | 2019-04-15 | 2019-04-15 | Internal tooth type ratchet screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209850781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877752A (en) * | 2019-04-15 | 2019-06-14 | 宁波泓谊塑胶科技有限公司 | A kind of internal-gear type ratchet screwdriver |
-
2019
- 2019-04-15 CN CN201920507448.0U patent/CN209850781U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877752A (en) * | 2019-04-15 | 2019-06-14 | 宁波泓谊塑胶科技有限公司 | A kind of internal-gear type ratchet screwdriver |
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